package com.zxl.grocery.microservice.common.util;

import javax.servlet.http.HttpServletRequest;

/**
 * Created by zxl on 2017/10/13 0013.
 */
public class ClientUtil {
    /**
     * 获取客户端真实ip
     * @param request
     * @return
     */
    public static String getClientIp(HttpServletRequest request){
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
            if (ip == null|| ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (ip == null|| ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ip == null|| ip.length() == 0|| "unknown".equalsIgnoreCase(ip)){
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (ip == null|| ip.length() == 0|| "unknown".equalsIgnoreCase(ip)){
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (ip == null|| ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } else if (ip.length() > 15){
            String[] ips = ip.split(",");
            for (int index = 0; index < ips.length; index++){
                String strIp = (String) ips[index];
                if (!("unknown".equalsIgnoreCase(strIp))) {
                    ip = strIp;
                    break;
                }
            }
        }
        return ip;
    }
}
